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American Tower Corp. SEC filings

American Tower filed 31 documents with the SEC in the last twelve months, the latest report being the 10-Q of 27 October 2026.

Filings in twelve months3121 of them 8-K news
Latest report10-Qfiled 27 Oct 2026
Latest filing10-Q27 Oct 2026
Last results, two-day move-2.4%results filed 27 Oct 2026
New to this? How to read this page
  1. Companies file with the SEC when something happens. 10-Q and 10-K are the quarterly and annual reports; 8-K is news that cannot wait for the next report.
  2. An 8-K says which items it covers, such as results, a change at the top or a big contract. A foreign company files a 6-K instead.
  3. The results release is usually an 8-K filed the day results come out, before the 10-Q or 10-K.
  4. Every filing links to the original on EDGAR, the SEC's own site.

Twelve months of filings

by kind

Most of the filings were other company news (17). Results came out 4 times.

Each mark is one filing on the day it was filed, in rows by kind. Hover or tap a mark for the form and what it was about.

The share price around each results release

close before to close after

Over the last 4 releases the share price moved 3.9% on average in the two days around results, the most on 28 Jul 2026 (+7.5%).

24 Feb 2026-4.0%$190.05 to $182.48
28 Apr 2026+1.6%$175.30 to $178.19
28 Jul 2026+7.5%$166.74 to $179.26
27 Oct 2026-2.4%$188.42 to $183.82
Daily closeResults filed

Each ring marks a results filing. The move runs from the last close before the filing to the first close after it, so it covers results released before the open or after the close. Hover the line for any day's close.

What the company told investors on 8-K

21 filings

American Tower's 21 news filings (8-K) were mostly about other events (10) and officer or director change (5).

  • Other eventsNews the company chose to file
    10 · latest 18 Sep 2026
  • Officer or director changeSomeone joined, left or changed role at the top
    5 · latest 18 Sep 2026
  • Results of operationsThe quarterly results release
    4 · latest 27 Oct 2026
  • Material agreementA large contract or deal was signed
    4 · latest 14 Sep 2026
  • New financial obligationNew debt or a borrowing
    4 · latest 14 Sep 2026
  • Shareholder voteResults of a vote at a shareholder meeting
    1 · latest 21 May 2026

Each line is one kind of news, with what it means in plain words. Each square is one filing; a filing can carry more than one kind, so the squares can add up to more than the filings. The date opens the latest one on EDGAR.

How it compares

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every filing as a table

    In the last twelve months American Tower Corp. filed 31 documents with the SEC of the kinds listed here: 21 current reports (8-K), about 10 other events; 5 officer or director change; 4 results of operations; 4 material agreement; 4 new financial obligation; 3 quarterly reports (10-Q), 2 additional proxy materials (DEFA14A), 1 employee share plan registration (S-8), 1 exchange notice removing a listed security, usually a note or a class of shares (25-NSE), 1 annual report to shareholders (ARS), 1 proxy statement (DEF 14A). The latest, filed 27 October 2026: 10-Q, quarterly report. The reports, the proxy statement and the prospectus themselves, where filed, each with a link to open it, are on the documents page.

    FiledFormWhat it was aboutPeriod or event dateFiling
    27 October 202610-Qquarterly report30 September 2026EDGAR
    27 October 20268-KResults of operations27 October 2026EDGAR
    18 September 20268-KOfficer or director change, Other events17 September 2026EDGAR
    14 September 20268-KMaterial agreement, New financial obligation14 September 2026EDGAR
    9 September 20268-KOther events9 September 2026EDGAR
    28 July 202610-Qquarterly report30 June 2026EDGAR
    28 July 20268-KResults of operations28 July 2026EDGAR
    4 June 20268-KOther events2 June 2026EDGAR
    2 June 20268-KOther events2 June 2026EDGAR
    27 May 20268-KMaterial agreement, New financial obligation27 May 2026EDGAR
    26 May 2026S-8employee share plan registrationEDGAR
    22 May 202625-NSEexchange notice removing a listed security, usually a note or a class of sharesEDGAR
    21 May 20268-KOfficer or director change, Shareholder vote, Other events20 May 2026EDGAR
    19 May 20268-KOther events19 May 2026EDGAR
    7 May 20268-KMaterial agreement, New financial obligation7 May 2026EDGAR
    28 April 2026DEFA14Aadditional proxy materialEDGAR
    28 April 202610-Qquarterly report31 March 2026EDGAR
    28 April 20268-KResults of operations28 April 2026EDGAR
    8 April 2026ARSannual report to shareholders31 December 2025EDGAR
    8 April 2026DEFA14Aadditional proxy materialEDGAR
    8 April 2026DEF 14Aproxy statement20 May 2026EDGAR
    10 March 20268-KOfficer or director change6 March 2026EDGAR
    5 March 20268-KOther events5 March 2026EDGAR
    27 February 20268-KOfficer or director change25 February 2026EDGAR
    24 February 202610-Kannual report31 December 2025EDGAR
    24 February 20268-KResults of operations24 February 2026EDGAR
    29 January 20268-KOfficer or director change26 January 2026EDGAR
    28 January 20268-KOther events28 January 2026EDGAR
    5 December 20258-KMaterial agreement, New financial obligation5 December 2025EDGAR
    4 December 20258-KOther events4 December 2025EDGAR
    2 December 20258-KOther events2 December 2025EDGAR
    An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
    Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.